CN114014643A - Anti-interference and high-voltage-resistant magnetic core material and preparation method thereof - Google Patents
Anti-interference and high-voltage-resistant magnetic core material and preparation method thereof Download PDFInfo
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- CN114014643A CN114014643A CN202111188551.1A CN202111188551A CN114014643A CN 114014643 A CN114014643 A CN 114014643A CN 202111188551 A CN202111188551 A CN 202111188551A CN 114014643 A CN114014643 A CN 114014643A
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- 239000011162 core material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 46
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000005751 Copper oxide Substances 0.000 claims abstract description 23
- 229910000431 copper oxide Inorganic materials 0.000 claims abstract description 23
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 23
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910000480 nickel oxide Inorganic materials 0.000 claims abstract description 23
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011787 zinc oxide Substances 0.000 claims abstract description 23
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 22
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims description 26
- 238000000227 grinding Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 21
- 239000007921 spray Substances 0.000 claims description 19
- 239000011812 mixed powder Substances 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 15
- 238000005469 granulation Methods 0.000 claims description 14
- 230000003179 granulation Effects 0.000 claims description 14
- 238000010304 firing Methods 0.000 claims description 11
- 239000008187 granular material Substances 0.000 claims description 10
- 239000013067 intermediate product Substances 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 238000000498 ball milling Methods 0.000 claims description 8
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical compound [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 claims description 8
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 5
- 238000000034 method Methods 0.000 claims 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000748 compression moulding Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 241001089723 Metaphycus omega Species 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
- C04B35/2625—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing magnesium
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
- C04B2235/3263—Mn3O4
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3281—Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3284—Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
Abstract
The invention relates to an anti-interference and high-voltage-resistant magnetic core material which comprises the following raw materials in parts by weight: 66-68 parts of ferric oxide, 16.5-17.5 parts of zinc oxide, 4.5-5.5 parts of copper oxide, 5-6 parts of magnesium oxide, 3-4 parts of nickel oxide and 1.5-2.5 parts of manganic oxide, and when the magnetic core obtained by the materials is used, the voltage resistance is improved by more than 50%, the insulation resistance is stably higher than 100 MOmega, and the welding temperature (tin welding) is improved by 15%, so that the anti-interference and high-voltage resistant characteristics and stability of the magnetic core can be effectively improved by adopting the mixture ratio of the components in the scheme.
Description
Technical Field
The invention relates to the technical field of oxidized magnetic materials, in particular to an anti-interference and high-voltage-resistant magnetic core material and a preparation method thereof.
Background
The ferrite is widely applied to magnetic cores and circuit boards, the proportion of the ferrite material plays a decisive role in the mechanical performance of the formed parts, taking the magnetic core as an example, the withstand voltage of the magnetic core made of the existing material on the market can only reach 2000V, so the use requirement can not be met in the ultrahigh voltage circuit, further, the insulation resistance is generally 50 M.OMEGA.to 100 M.OMEGA.which is very unstable and extremely dangerous in the case of ultra-high voltage transmission, and further, the soldering temperature is only plus or minus 10 percent of 410 ℃, after the magnetic core is soldered at high temperature, because the magnetic core is a poor conductor of heat, microcracks are easy to appear, the magnetic core prepared by the proportion of the existing magnetic core material can not be subjected to secondary sintering, namely the preheating treatment can not be carried out on the magnetic core, therefore, the temperature of the solder joint formed by the tin bar during soldering is much higher than that of the magnetic core, and therefore, the problem of cracking or the like is likely to occur.
Disclosure of Invention
In order to make up for the above deficiencies, the invention provides an anti-interference and high-voltage-resistant magnetic core material and a preparation method thereof, so as to solve the above problems.
An anti-interference and high-voltage-resistant magnetic core material comprises ferric oxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide and manganic manganous oxide.
The raw materials comprise the following components in parts by weight: 66-68 parts of ferric oxide, 16.5-17.5 parts of zinc oxide, 4.5-5.5 parts of copper oxide, 5-6 parts of magnesium oxide, 3-4 parts of nickel oxide and 1.5-2.5 parts of manganic oxide.
A preparation method of an anti-interference and high-voltage-resistant magnetic core comprises the following steps: mixing and ball-milling ferric oxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide and manganous manganic oxide according to the parts by weight to obtain mixed powder, adding the mixed powder into a planetary ball mill for grinding to obtain powder, removing impurities in the powder by primary burning, finely grinding the powder by a grinding mill to obtain a particle size of not more than 0.01mm, then carrying out spray granulation, and carrying out compression molding, wherein the specific steps are as follows:
s1: weighing powder: taking ferric oxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide and manganous manganic oxide according to parts by weight, mixing and ball-milling to obtain mixed powder.
S2: primary sintering: and placing the mixed powder into a kiln for primary combustion, wherein the primary combustion temperature is 990-.
S3: grinding: and (3) putting the intermediate product into a grinder for grinding, wherein the grain diameter of the ground intermediate product is not more than 0.01 mm.
S4: spray granulation: and (3) carrying out spray granulation on the product obtained in the step (S3), and preparing granules with the particle size of 0.01-0.1mm by adopting a centrifugal spray dryer.
S5: molding: and pressing the granules by a powder press to form the required blank.
S6: cutting: and cutting the blank to obtain the I-shaped magnetic core.
S7: and (3) sintering: sintering the blank, controlling the sintering temperature at 1200 ℃ and the heat preservation time at 150 ℃ for 200 min.
S8: and (4) checking: and detecting the magnetic core, wherein the detected values comprise a withstand voltage value and an insulation resistance.
S9: packaging: and packaging the qualified product.
As a preferable technical scheme, the purity of the ferric oxide in the S1 in the S1 is not less than 99.3%, the purity of the zinc oxide is not less than 99.7%, the purity of the copper oxide is not less than 99%, the purity of the magnesium oxide is not less than 93%, the purity of the nickel oxide is not less than 97%, and the purity of the manganic oxide is not less than 98%.
Preferably, the initial firing temperature in S2 is 1000 ℃.
Preferably, in S6, high-speed cutting is used.
As a preferable technical scheme, the sintering temperature in S7 is 1160 ℃, and the heat preservation time is 180 min.
Preferably, the withstand voltage value of S8 is not less than 3000V, and the insulation resistance is not less than 100M omega.
The invention has the beneficial effects that: 66-68 parts of ferric oxide, 16.5-17.5 parts of zinc oxide, 4.5-5.5 parts of copper oxide, 5-6 parts of magnesium oxide, 3-4 parts of nickel oxide and 1.5-2.5 parts of manganic oxide, and when the magnetic core obtained by the materials is used, the voltage resistance is improved by more than 50%, the insulation resistance is stably higher than 100 MOmega, and the welding temperature (tin welding) is improved by 15%, so that the anti-interference and high-voltage resistance and stability of the magnetic core can be effectively improved by adopting the mixture ratio of the components in the scheme.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships that are convenient and simple to describe, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
an anti-interference and high-voltage-resistant magnetic core material comprises ferric oxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide and manganic manganous oxide.
A preparation method of an anti-interference and high-voltage-resistant magnetic core comprises the following steps: taking 66.9 parts of ferric oxide, 16.8 parts of zinc oxide, 5.3 parts of copper oxide, 5.8 parts of magnesium oxide, 3.5 parts of nickel oxide and 1.7 parts of manganous oxide according to the parts by weight, mixing and ball-milling to obtain mixed powder, adding a planetary ball mill for grinding to obtain powder, removing impurities in the powder by primary combustion, finely grinding by a grinding mill to obtain a particle size of not more than 0.01mm, then carrying out spray granulation, and carrying out compression molding, wherein the specific steps are as follows:
s1: weighing powder: taking 66.9 parts of ferric oxide, 16.8 parts of zinc oxide, 5.3 parts of copper oxide, 5.8 parts of magnesium oxide, 3.5 parts of nickel oxide and 1.7 parts of manganous oxide according to the parts by weight, mixing and ball-milling to obtain mixed powder, wherein the purity of the ferric oxide is not lower than 99.3%, the purity of the zinc oxide is not lower than 99.7%, the purity of the copper oxide is not lower than 99%, the purity of the magnesium oxide is not lower than 93%, the purity of the nickel oxide is not lower than 97%, and the purity of the manganous oxide is not lower than 98%.
S2: primary sintering: and placing the mixed powder into a kiln for primary firing, wherein the primary firing temperature is 990-1010 ℃, and more specifically, the primary firing temperature is 1000 ℃.
S3: grinding: and (3) putting the intermediate product into a grinder for grinding, wherein the grain diameter of the ground intermediate product is not more than 0.01 mm.
S4: spray granulation: and (3) carrying out spray granulation on the product obtained in the step (S3), and preparing granules with the particle size of 0.01-0.1mm by adopting a centrifugal spray dryer.
S5: molding: and pressing the granules by a powder press to form the required blank.
S6: cutting: and cutting the blank to obtain the I-shaped magnetic core, wherein high-speed cutting is adopted.
S7: and (3) sintering: and sintering the blank, wherein the sintering temperature is controlled to be 1100-1200 ℃, and the heat preservation time is 150-200min, more specifically, the sintering temperature is 1160 ℃, and the heat preservation time is 180 min.
S8: and (4) checking: and detecting the magnetic core, wherein the detected value comprises a withstand voltage value and an insulation resistance, the withstand voltage value is 2800 and 3200V, and the insulation resistance is stabilized at more than 100M omega.
S9: packaging: and packaging the qualified product.
Example 2:
an anti-interference and high-voltage-resistant magnetic core material comprises ferric oxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide and manganic manganous oxide.
A preparation method of an anti-interference and high-voltage-resistant magnetic core comprises the following steps: taking 66 parts of ferric oxide, 16.5 parts of zinc oxide, 4.5 parts of copper oxide, 5 parts of magnesium oxide, 3 parts of nickel oxide and 1.5 parts of manganic oxide according to the parts by weight, mixing and ball-milling to obtain mixed powder, adding the mixed powder into a planetary ball mill to grind to obtain powder, removing impurities in the powder by primary combustion, finely grinding by a grinding machine to obtain the powder with the particle size of not more than 0.01mm, then carrying out spray granulation and compression molding, and specifically comprising the following steps:
s1: weighing powder: taking 66 parts of ferric oxide, 16.5 parts of zinc oxide, 4.5 parts of copper oxide, 5 parts of magnesium oxide, 3 parts of nickel oxide and 1.5 parts of manganic oxide according to the parts by weight, mixing and ball-milling to obtain mixed powder, wherein the purity of the ferric oxide is not lower than 99.3%, the purity of the zinc oxide is not lower than 99.7%, the purity of the copper oxide is not lower than 99%, the purity of the magnesium oxide is not lower than 93%, the purity of the nickel oxide is not lower than 97%, and the purity of the manganic oxide is not lower than 98%.
S2: primary sintering: and placing the mixed powder into a kiln for primary firing, wherein the primary firing temperature is 990-1010 ℃, and more specifically, the primary firing temperature is 1000 ℃.
S3: grinding: and (3) putting the intermediate product into a grinder for grinding, wherein the grain diameter of the ground intermediate product is not more than 0.01 mm.
S4: spray granulation: and (3) carrying out spray granulation on the product obtained in the step (S3), and preparing granules with the particle size of 0.01-0.1mm by adopting a centrifugal spray dryer.
S5: molding: and pressing the granules by a powder press to form the required blank.
S6: cutting: and cutting the blank to obtain the I-shaped magnetic core, wherein high-speed cutting is adopted.
S7: and (3) sintering: and sintering the blank, wherein the sintering temperature is controlled to be 1100-1200 ℃, and the heat preservation time is 150-200min, more specifically, the sintering temperature is 1160 ℃, and the heat preservation time is 180 min.
S8: and (4) checking: and detecting the magnetic core, wherein the detected values comprise a withstand voltage value and an insulation resistance, wherein the withstand voltage value is 2500-2800V, and the insulation resistance is 70-80M omega.
Example 3:
an anti-interference and high-voltage-resistant magnetic core material comprises ferric oxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide and manganic manganous oxide.
A preparation method of an anti-interference and high-voltage-resistant magnetic core comprises the following steps: taking 68 parts of ferric oxide, 17.5 parts of zinc oxide, 5.5 parts of copper oxide, 6 parts of magnesium oxide, 4 parts of nickel oxide and 2.5 parts of manganic oxide according to the parts by weight, mixing and ball-milling to obtain mixed powder, adding the mixed powder into a planetary ball mill for grinding to obtain powder, removing impurities in the powder by primary combustion, finely grinding by a grinding machine to obtain the powder with the particle size of not more than 0.01mm, then performing spray granulation, and performing compression molding, wherein the specific steps are as follows:
s1: weighing powder: 68 parts of ferric oxide, 17.5 parts of zinc oxide, 5.5 parts of copper oxide, 6 parts of magnesium oxide, 4 parts of nickel oxide and 2.5 parts of manganic oxide are taken according to the parts by weight, mixed and ball-milled to obtain mixed powder, wherein the purity of the ferric oxide is not lower than 99.3%, the purity of the zinc oxide is not lower than 99.7%, the purity of the copper oxide is not lower than 99%, the purity of the magnesium oxide is not lower than 93%, the purity of the nickel oxide is not lower than 97%, and the purity of the manganic oxide is not lower than 98%.
S2: primary sintering: and placing the mixed powder into a kiln for primary firing, wherein the primary firing temperature is 990-1010 ℃, and more specifically, the primary firing temperature is 1000 ℃.
S3: grinding: and (3) putting the intermediate product into a grinder for grinding, wherein the grain diameter of the ground intermediate product is not more than 0.01 mm.
S4: spray granulation: and (3) carrying out spray granulation on the product obtained in the step (S3), and preparing granules with the particle size of 0.01-0.1mm by adopting a centrifugal spray dryer.
S5: molding: and pressing the granules by a powder press to form the required blank.
S6: cutting: and cutting the blank to obtain the I-shaped magnetic core, wherein high-speed cutting is adopted.
S7: and (3) sintering: and sintering the blank, wherein the sintering temperature is controlled to be 1100-1200 ℃, and the heat preservation time is 150-200min, more specifically, the sintering temperature is 1160 ℃, and the heat preservation time is 180 min.
S8: and (4) checking: and detecting the magnetic core, wherein the detected values comprise a withstand voltage value and an insulation resistance, wherein the withstand voltage value is 2600-.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an anti-interference, high pressure resistant magnetic core material which characterized in that: the raw materials comprise: iron sesquioxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide, and manganic oxide.
2. The tamper-resistant, high voltage tolerant magnetic core material of claim 1, wherein: the raw materials comprise the following components in parts by weight: 66-68 parts of ferric oxide, 16.5-17.5 parts of zinc oxide, 4.5-5.5 parts of copper oxide, 5-6 parts of magnesium oxide, 3-4 parts of nickel oxide and 1.5-2.5 parts of manganic oxide.
3. A preparation method of an anti-interference and high-voltage-resistant magnetic core is characterized by comprising the following steps: the anti-interference and high-voltage-resistant magnetic core material as claimed in any one of claims 1-2, and the preparation method thereof, comprises the following steps:
s1: weighing powder: mixing and ball-milling ferric oxide, zinc oxide, copper oxide, magnesium oxide, nickel oxide and manganic manganous oxide according to parts by weight to obtain mixed powder;
s2: primary sintering: placing the mixed powder into a kiln for primary combustion at 990-1010 ℃;
s3: grinding: grinding the intermediate product in a grinder, wherein the grain size of the ground intermediate product is not more than 0.01 mm;
s4: spray granulation: carrying out spray granulation on the product obtained in the step S3, and preparing granules with the particle size of 0.01-0.1mm by adopting a centrifugal spray dryer;
s5: molding: pressing the granules by a powder pressing machine to form a required blank;
s6: cutting: cutting the blank to obtain an I-shaped magnetic core;
s7: and (3) sintering: sintering the blank, controlling the sintering temperature at 1200 ℃ and the heat preservation time at 150 ℃ for 200 min;
s8: and (4) checking: detecting the magnetic core, wherein the detected values comprise a withstand voltage value and an insulation resistance;
s9: packaging: and packaging the qualified product.
4. The method for manufacturing an anti-interference, high voltage resistant magnetic core according to claim 3, wherein: the purity of ferric oxide in the S1 is not less than 99.3%, the purity of zinc oxide is not less than 99.7%, the purity of copper oxide is not less than 99%, the purity of magnesium oxide is not less than 93%, the purity of nickel oxide is not less than 97%, and the purity of manganous manganic oxide is not less than 98%.
5. The method for manufacturing an anti-interference, high voltage resistant magnetic core according to claim 3, wherein: the initial firing temperature in the S2 is 1000 ℃.
6. The method for manufacturing an anti-interference, high voltage resistant magnetic core according to claim 3, wherein: in S6, high-speed cutting is used.
7. The method for manufacturing an anti-interference, high voltage resistant magnetic core according to claim 3, wherein: and in the S7, the sintering temperature is 1160 ℃, and the heat preservation time is 180 min.
8. The method for manufacturing an anti-interference, high voltage resistant magnetic core according to claim 3, wherein: and the withstand voltage value of S8 is not less than 3000V, and the insulation resistance is not less than 100M omega.
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